The Chilean forward never gives less than 100% when he is on the pitch and it is his absolute commitment which has helped him become one of the best players on the face of the Earth.

But it can also be his downfall.

In any sport, injuries are commonplace, and when you go all-out all the time like Sanchez does, you only increase that risk for yourself.

As intelligent a player as he is, Sanchez often needs to be saved from himself by being given time to rest and recover.

On Saturday, with Arsenal leading their perennial bogey team Swansea City by four goals to nil, Arsene Wenger elected to replace his star player with little over ten minutes remaining.

Alexis was taken off against Swansea, but the game had already been won

Sanchez was clearly unhappy with the substitution, and could be seen sulking on the side of the pitch with his head hanging down as the play continued without him.

While his competitive streak is a vital part of who he is, Sanchez would do well to appreciate his manager looking out for him. Because it hasn’t always been that way in the past.

During his time at Barcelona, Sanchez had to deal with a rather less sympathetic Pep Guardiola.

Sanchez was forced off with an injury during a game for the Catalans the same week as he turned out a full 90 minutes in a friendly for Chile. As he leaves the pitch, Guardiola can be seen berating the Chilean.

While a direct translation does not exactly work, Guardiola is basically saying: “You mother*cker! You mother*cker! 90 minutes! Use your head!”